Engine.



Elm 789,300. PATENTED MAY 9, 1905. L. N. TONNS.

ENGINE.

APPLICATION FILED JULY 12,1900. RENEWED SEPT. 23,1904.

2 SHEETS-SHEET 2.

WITNESSES: INVENTOR oaisfl 702 M lax Q HIS ATTORNEY lllivirien drains Farisniir Patented May 9, 9O 5.

LOUIS N. TONNS. OF COLLEGEIOINI, NEIV YORK, ASSIGNOR OF ONE- HALF TO EDWARD H. HALL, OF MOUNT VERNON, N EW YORK.

ENGINE SPECIFICATION forming part of Letters Patent No. 789,300, dated May 9, 1905.

Application filed July 12, 1900. Renewed September 23, 1904 Serial No 225,569.

To rr/ZZ mil/071i it "may concern.-

Be it known. that I, LOUIS N. ToNNs, a citizen of the United States, residing at Collegepoint, in the county of Queens and State of New York, have invented certain new and useful Improvements in Engines, of which the following is a specification.

My invention relates to engines, and particularly to that class of engines which have a rotary piston operated upon by an expansible gas.

I will describe an engine embodying my invention and then point out the novel features thereof inv the claims.

In the accompanying drawings, Figure 1. is a cross-sectional view of an engine embodying my invention, taken on the line a l) of Fig. 2, the said section being irregular in order that some parts may be shown in elevation. Fig. 2 is a crosssectional view taken on the line 0 d of Fig. 1.

Similar letters of reference designate corresponding parts in both of the figures.

A represents a suitable casing having, preferably, an open central portion. For convenience it is made in two sections a a, which are bolted together, and the lower sec tion is provided with a base c Mounted on the base are two standards a, provided with suitable bearings in which the ends of a shaft B are journaled. The shaft B is provided with a fly, balance, or other wheel l).

C represents a rotary piston which is keyed in position on the shaft B. The piston is here shown as being in the form of a pulley, the peripheral portion of which i its in and retates in an annular recess or chamber provided in the casing. The periphery of the piston is provided with a channel, recess, or chamber 0, which extends nearly around the periphery, so as to leave a portion 0 against which the gas expands.

The upper portion of the casing A is provided with a chamber d, in which a swinging abutment D fits and works. The abutment D is keyed onto a shaft (1 and is provided with the arms or projecting portions d (Z The shaft d is suitably journaled in. the easing A and provided with a handle d, by

tion of this engine is carbonic gas.

means of which the abutment may be manually operated. If desired, the abutment D may be operated from the shaft B, and any suitable connection may be provided. The abutment D has a free movement in the chamber in order that it can be shifted by the incoming gas. The arms or projections d d are also of such a thickness as to close the channel, recess, or chamber 0 in the piston, so that the gas will not be permitted to expand except against the part c of the piston.

(1 represents a chamber or recess in one side of the abutment through which the OX- haust-gas passes. The chamber d is in communication with a passage d provided in the casing A, with which recess an exhaustpipe 6 communicates.

E represents a part surmo'unting the easing A and secured thereto, in which. is provided the gasinlet passage c, which is branched to form the two passages c 0, leading to opposite sides of the abutment D. A plug-valve F is provided in the part 15 and is provided with two ports or passages f f. The plug is adapted to be reciprocated by hand, and its movement in one direction is limited by a head f and in the other direction by a pin f At the limit of the movement of the valve F in one direction one of the ports or passages-as, for example,fis in registry with the branch passage 6 and at the limit of its movement in the opposite direction the port or passage f is in registry with the branch passage (2 When the port and passage 6 are in registry, the piston Wlll be driven 111 one direction, and when the portf and passage 6 are in. registry the piston will be driven in the reverse direction.

G represents a cut-off valve for con trolling the passage c. This valve is operated from the shaft B by means of an eccentric g and pitman g. The valve may be of any desired form. I have shown it as being in the form of a rod having a reduced part g, which portion is brought into the passage 0 when. a charge of gas is to be expanded against the portion 0.

The gas preferably employed in the opera- This may be stored in tanks, which are connected with the passage 6. As the gas enters the passage 6 it will pass to either side of the abutment I), according to which passage (3 or e the valve F has open. The gas contacting with the end of the abutment D rocks it on its shaft and escapes past it into the casing A and expands against the portion 0, thereby position being controlled mainly by the gas entering either of the passages e or 6 Also for a quick reversal of the engine the abutment may be operated by hand.

What I claim as new, and desire to secure by letters Patent, is-

1. In an engine, the combination of a casing, a rotatable piston within the casing and having a single channel extending nearly around its periphery, a chamber provided above the piston, a swinging abutment mounted on a shaft and located in said chamber and adapted to have its ends fit in the channel of the piston for guiding an expansible gas or other power into said channel, branch passages for the power leading to said abutment, a valve for controlling said pas sages, and a single exhaust chamber provided in a side of the abutment between its ends which is in communication with the peripheral channel of the piston.

2. In an engine, the combination of a casing having a chamber, a rotatable piston located within said chamber and having a channel extending nearly around its periphery, a second chamber above the piston-chamber, a swinging abutment located in said second chamber and adapted to have its ends fit in the channal of the piston, a single exhaustchamber provided in a side of the abutment between its ends which is in constant communication with the channel in the piston, an exhaust-passage in communication with the exhaust-chamber, a passage for power which passage has branches for supplying power to either side of the abutment, and a valve for controlling said passages.

3. In an engine, the combination of a casing having a chamber, a rotatable piston located within said chamber and having a passage extending nearly around its periphery, a second chamber above the piston-chamber, a swinging abutment located in said second chamber and adapted to have its ends fit in the channel of the piston, an exhaust-cham ber provided in a side of the abutment and normally in communication with the channel in the piston, a passage for power which passage has branches for supplying power to either side of the abutment, a valve for controlling said passages, and a second valve operated by an eccentric moving with the piston for intermittently cutting off the power.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

LOUIS N. TONNS IVitnesses:

GEO. E. CRUsE, K. G. LE ARD. 

